二维g-AlN材料中n型掺杂探索：基于第一性原理的带电缺陷计算

电荷转移能级和缺陷形成能的计算对探索半导体材料的n型和p型掺杂效率具有重要的指导意义。基于第一性原理方法,结合二维带电缺陷计算理论,系统计算了二维类石墨烯氮化铝(graphene-like AlN, g-AlN)中四种（C_Al,Si_Al,Ge_Al,Sn_Al）可能的n型掺杂体系的结构、磁学、电学以及缺陷性质。结果表明,四种体系的最稳定价态均为+1价和0价,Sn_Al具有较深的施主能级,不具备为二维g-AlN提供n型载流子的条件,而C_Al,Si_Al,Ge_Al表现为浅能级施主特性,均能在一定条件下成为理想的施主杂质,其中Si_Al具有最浅的施主特性以及最低的缺陷形成能,因而是二维g-AlN中实现n型掺杂的首选掺杂剂。另外,在p型二维g-AlN中,四种掺杂原子都会成为有效的空穴捕获中心,严重降低p型载流子导电率。研究数据将会为实验上实现二维g-AlN n型掺杂提供理论解释和指导。     

Green chemistry: Analytical and chromatography

Nowadays, the environment protection and the personal health and safety are given more consideration in the field of chemistry, thus resulting in an increased number of published researches about how to work according to green instructions, to follow up the recommendations of environmental agencies and to obtain better clean handling of chemistry. In this review, green chemistry definition, importance, principles, and some recent applications in the field of green chemistry were discussed. In addition, the review summarizes the evolution of green analytical chemistry (GAC) with its specific principles and how to make the analytical process more environmentally benign with special emphasis on recent applications of GAC. Moreover, the green chromatography, its methods, and some of its applications were outlined. Finally, different techniques available up till now for the assessment of greening of the methods were also presented.     

构建基于ISO9001标准的实践教学质量监控新体系的研究

基于ISO9001质量管理标准,对构建一个完整的"文件化"的实践教学质量监控体系作了如下探讨:将ISO9001质量管理标准"八项原则"的思想引入到实践教学质量管理中;通过树立新的教育教学观念和构建组织保障体系,落实监控体系中各项举措.该体系的应用表明,对不断提高实践教学效果和提升人才培养质量作用明显.     

类型理论观照下大观园中公示语翻译探讨

基于德国著名学者、翻译理论家凯瑟琳娜?赖斯（Katharina Reiss）的文本类型理论，将文本划分为信息类文本、表现类文本和操作类文本，并对《红楼梦》大观园中的建筑名称加以界定，探讨其翻译，提出大观园中公示语主要属于信息类文本和表现类文本，通过比较杨宪益戴乃迭夫妇和戴维?霍克斯的两种译本（文中分别简称杨译和霍译），在前人研究基础上，提出大观园中建筑名称翻译原则。     

关于波力机设计原则的思考（一）

按波力机干线功能、支线功能和辅助功能的不同需求正确制定或选用设计原则，可确保所设计的波力机科学合理、高效低耗和安全稳定地运行，可确保实现波力机的预期功能和性能———遵守拾能量最大化原则而采用聚浪罩，可低成本地大幅提高其灵敏度和拾能量；遵守拾能效率最大化原则和自行避灾原则而采用机架移动于轨道刚性固定方式和配置自动跟踪浪向与潮位的系统，可兼顾岸基式和漂浮式拾能方式的长处而弥补其缺陷；遵守配平原则和有功功率最大化原则而配置配重体，可确保因提高强度而被迫增加自重的拾－换能器效率高居不降；遵守三全原则和换能效率最大化原则而采用“水缸”技术，可确保扭矩和换能效率始终以最大值运行；遵守所用原理之间无冲突原则，可确保波力机运行流畅等。制定和遵守设计原则是理论指导开发利用波浪能实践的理性行为。种种关联的设计原则构成了波力机设计之科学合理与否的事前保证体系、事后检验或评判标准，及其商品化进程中的第一关。     

Experimental and theoretical study of charge‐transfer complex hybrid polyimide membranes

The nanostructure of sulfonated polyimide (SPI)/dihydroxynaphthalene (DHN) derivative charge‐transfer (CT) complex hybrid films, which are noble alternative polymer electrolyte membranes (PEMs), is determined by a combined visible spectroscopy/quantum mechanical approach. From the visible spectra of SPI/2,6‐dihydroxynaphthalene (2,6‐DHN) and 1,5‐dihydroxynaphthalene (1,5‐DHN) CT complex hybrid films, it is confirmed that these films have different maximum wavelength, although difference of the molecular structure is small. From the calculation based on the experimental result, SPI and DHNs form multiple interactions consisting of not only CT interaction, but also hydrogen bonding in multilayered structures. CT interaction between SPI and DHN defines the DHN position in the SPI matrix, with DHN sitting in the cavity formed between SPIs. The molecular structure of the CT films derived from the multiple and complex interactions can recognize small differences in the structural isomers and bring changes of the optical property. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014 , 52, 293–298     

机械装备备件采购模糊决策研究

针对机械产品备件采购问题,阐明了备件采购的基本原则、程序和方法;运用模糊数学的理论和方法,建立了备件采购决策模型,构造了机械系统备件模糊关系矩阵,求解了零部件模糊决策集合并求出了最大隶属度,确定了备件采购的品种和数量.给出了GJW111型机械装备的备件采购决策实例,为机械装备备件采购工作提供科学决策.图2,参10.     

图书采购新模式——网上采购

图书网上采购是一种新的采购模式，可分为网上书目信息查找，筛选预订，货款电子支付及文献发送4个步骤。与传统图书采购方式相比，网上采购具有书目信息量大并且直观，效率高，跨越时空等优势。     

Laplace Transform and New Mathematical Theory of Viscoelasticity

In this paper generalized variational principles in thesense of the Laplace transform for viscoelastic problems arederived. Then mathematical theory of viscoelasticity ingeneralized Hardy spaces and in weighted anisotropic Sobolevspaces and spectral theory of corresponding non-selfadjointoperators is elaborated. Finally the Laplace transform--FEMfor numerical analysis of time-dependent problems of themathematical physics is proposed and analysed.     

公差原则应用实例分析

公差原则是进行精度设计时处理尺寸公差与形位公差关系的指导原则。本文作者着重阐述3个公差原则的区别,分析典型实例,明确说明三种公差原则的应用场合,并指出合理地选用公差原则对提高机械产品质量、降低生产成本的作用。